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[HIGH] Prevent SQL injection in set_client_encoding #741

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Merged
larskanis merged 1 commit into from
Sep 3, 2026
+3 −3
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[HIGH] Prevent SQL injection in set_client_encoding #741

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6 changes: 3 additions & 3 deletions ext/pg_connection.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4404,12 +4404,12 @@ pgconn_external_encoding(VALUE self)
static VALUE
pgconn_async_set_client_encoding(VALUE self, VALUE encname)
{
VALUE query_format, query;
VALUE query;

rb_check_frozen(self);
Check_Type(encname, T_STRING);
query_format = rb_str_new_cstr("set client_encoding to '%s'");
query = rb_funcall(query_format, rb_intern("%"), 1, encname);
query = rb_str_new_cstr("set client_encoding to ");
rb_str_concat(query, pgconn_escape_literal(self, encname));

pgconn_async_exec(1, &query, self);
pgconn_set_internal_encoding_index( self );
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